We asked Samsung how it determined the 840 Series was immune, and we're still waiting on a response. However, German site ComputerBase has published a statement from the company that seems to acknowledge a problem with the older drive. The Google translation is a little rough, but PC Perspective has a better one that says "accessing specific data with units of SSD 840 could lead to lower reading performance." Samsung is reportedly working on a solution, but there's no associated timeline.Source: The Tech Report
Interestingly, the translated Samsung statement goes on to say, "Due to different technologies the PRO-series (840 PRO and 850 PRO) are not affected." That technology difference is the number of bits per cell: MLC drives like Pros have two bits, while the 840 Series and 840 EVO use three-bit TLC NAND.
Samsung acknowledges 840 Series SSD performance issues
Posted on Thursday, October 30 2014 @ 13:27 CET by Thomas De Maesschalck